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2 years ago

The density of lead is 30.2g/cm^3.what is the value in kilograms per meter cube?

Physics

1 answer:

V125BC [204]2 years ago

3 0

Answer:
11300 kgm3

Hope this helps

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Energy is defined as ____. a. movement of electrons b. capacity to store sugar c. the movement of atoms and molecules d. the

8090 [49]

Answer:

option (d)

Explanation:

Energy is defined as the capacity to do work.

Energy can neither be created and nor be destroyed, it can transform from one form to another.

The SI unit of energy is Joule and teh commercial unit of energy is kilowatt hour.

There are several forms of energy.

1. kinetic energy

2. potential energy

3. mechanical energy

4. Solar energy

5. Sound energy

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2 years ago

An underground cannon launches a cannonball from ground level at a 35 degree angle. the cannonball is shot with an initial veloc

user100 [1]

Answer:

Time = 1.75[s]; Distance traveled = 21.5 [m]; Max height = 15 [m]

Explanation:

First, we have to break down the velocity vector into the X & y components.

$(v_{x})_{0} = 15 * cos( 35)= 12.28[m/s]\\(v_{y})_{0} = 15 * sin( 35)= 8.6[m/s]\\\\$

To find the time t that lasts the ball of cannon in the air we must use the following equation of kinematics, in this equation the value of y is equal to zero because it will be proposed that the ball lands at the same level that was fired.

$y=(v_{y} )_{0}-\frac{1}{2}*g*t^{2} \\where:\\g=9.81[m/s^2]\\t = time[s]\\y=0[m]$

$0=8.6*t-\frac{1}{2}*9.81*t^{2} \\4.905*t^{2}=8.6*t\\ t=1.75[s]$

In order to find the distance traveled horizontally from the cannonball, we must use the speed kinematics equation in the X coordinate.

$x = (v_{x})_{0} *t\\x=12.28*1.75\\x=21.5 [m]$

In order to find the last value, we must bear in mind that when the cannonball reaches the maximum height, the velocity in the component y is equal to zero, and we can find the value of and with the following kinematic equation

$y = (v_{y})_{0} *t+\frac{1}{2} *g*(t)^{2} \\y = 0*t+\frac{1}{2} *9.81*(1.75)^{2}\\ y=15 [m]$

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3 years ago

The tendency for an object to sink or float has to do with the object's density.<br> True<br> False

Stella [2.4K]

Answer:

TRUE

Explanation:

BECAUSE AN OBJECTS DENSITY SHOWS HOW MUCH WEIGHT IS PER CUBIC UNIT. LIKE SAD HAS MORE DENSITY THAN WATER SO IT SINKS WHILE WOOD HAS LESS DENSITY THAN WATER SO IT FLOATS

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3 years ago

Please help me<br> asdfghjklqwertyuioikjhgfrfghjuhygfdfghjmhgtfhjk

sertanlavr [38]

Answer:

Explanation:

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2 years ago

Suppose a particle is accelerated through space (no gravity) by a 10 N force. Suddenly the particle encounters a second force of

iren2701 [21]

please dont mind me just looking for points

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3 years ago